CN105554367A - Movement photographing method and mobile terminal - Google Patents
Movement photographing method and mobile terminal Download PDFInfo
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- CN105554367A CN105554367A CN201510640924.2A CN201510640924A CN105554367A CN 105554367 A CN105554367 A CN 105554367A CN 201510640924 A CN201510640924 A CN 201510640924A CN 105554367 A CN105554367 A CN 105554367A
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Abstract
The embodiment of the invention discloses a movement photographing method and a mobile terminal. The method comprises the steps that N frames of images are acquired in the first N time intervals of preset photographing time through a camera, and N positions of a target object in the first N time intervals are determined according to the N frames of images, wherein N is an integer greater than 4; starting from the Nth time interval, the position of the target object in the next time interval is predicted according to the position of the target object in each time interval till now; the focusing point of the camera is adjusted in the next time interval according to the predicted position of the target object in the next time interval and the image of the target object is acquired until the end of preset photographing time; and at least two frames of images meeting the preset conditions are selected from the acquired images, and a dynamic image is synthesized according to the selected at least two frames of images. With application of the movement photographing method and the mobile terminal, definition of the image obtained by photographing a moving object can be enhanced.
Description
Technical field
The present invention relates to optical image technology field, particularly relate to a kind of moving camera shooting method and mobile terminal.
Background technology
Along with the development of terminal technology, the function of terminal is day by day diversified.Nowadays the many terminals on market are all equipped with camera, can implement to take pictures or camera function.
In prior art, mobile terminal is by the movement locus of camera shot object, and conventional method is: within a period of time, takes multiple images according to fixed time interval, by these multiple Images uniting dynamic image, the movement locus of object can be shown in the picture.But in practical operation, because object is kept in motion, camera is not focused when each shooting the object of motion, and the image definition obtained is not high.Therefore, the how shooting clear degree of lifter motion object is those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
The embodiment of the invention discloses a kind of moving camera shooting method and mobile terminal, the definition of moving object being taken to the image obtained can be improved.
Embodiment of the present invention first aspect discloses a kind of moving camera shooting method, and it can comprise:
By obtaining N two field picture in the top n time interval of camera in the shooting time preset, and determine in N number of position of described top n time interval internal object thing according to described N two field picture, wherein N be greater than 4 integer;
From N number of time interval, according to the position of described object in the position prediction of the described object next time interval in each time interval till current;
According to the position of described object in the next time interval of prediction, adjust the focusing of described camera in the described next time interval and obtain the image of described object, until described default shooting time terminates;
Select to meet at least two pre-conditioned two field pictures from obtained image, and according to selected at least two two field picture synthesis dynamic images.
In conjunction with first aspect, in the execution mode that the first is feasible, described camera comprises the first camera and second camera, and described method also comprises:
With the line of described first camera and described second camera for reference axis, with the mid point of described line for the origin of coordinates, set up three-dimensional orthogonal coordinate system;
The position of wherein said object is the coordinate of described object in described three-dimensional orthogonal coordinate system.
In conjunction with the first feasible execution mode of first aspect, in the execution mode that the second is feasible, described selection from obtained image meets at least two pre-conditioned two field pictures, comprising:
Select the image obtained within N+1 the time interval;
From N+2 the time interval, after often obtaining a two field picture, judge that the position vector of described object in current time interval and last time select the first angle between the position vector of described object in the time interval of image whether to be greater than default angle threshold;
If described first angle is greater than default angle threshold, then select the described two field picture obtained.
In conjunction with the first feasible execution mode of first aspect, in the execution mode that the third is feasible, described first camera and described second camera are rotating camera, the described position according to described object in the next time interval of prediction, adjust the focusing of described camera in the described next time interval, comprising:
In described three-dimensional orthogonal coordinate system, determine the position vector of described object in current time interval and prediction within the described next time interval described object position vector between the second angle;
According to described second angle described first camera of adjustment and the anglec of rotation of described second camera, to focus the position of described object within the described next time interval of described prediction to make described first camera and described second camera.
In conjunction with the first feasible execution mode of first aspect, in the 4th kind of feasible execution mode, described from N number of time interval, according to the position of described object in the position prediction of the described object next time interval in each time interval till current, comprising:
From N number of time interval, the coordinate of described object in described three-dimensional orthogonal coordinate system determined is carried out curve fitting, determine or upgrade the coordinate-function of time of described object in each time interval before according to the image obtained;
By the time application in the described next time interval in described coordinate-function of time, obtain the coordinate of described object in the next time interval.
Embodiment of the present invention second aspect provides a kind of mobile terminal, can comprise:
Acquisition module, for by obtaining N two field picture in the top n time interval of camera in the shooting time preset, and determines in N number of position of described top n time interval internal object thing according to described N two field picture, wherein N be greater than 4 integer;
Prediction module, for from N number of time interval, according to the position of described object in the position prediction next time interval of described object in each time interval till current;
Focusing module, for according to the position of described object in the next time interval of prediction, adjusts the focusing of described camera in the described next time interval and obtains the image of described object, until described default shooting time terminates;
Selecting module, meeting at least two pre-conditioned two field pictures for selecting from obtained image, and according to selected at least two two field picture synthesis dynamic images.
In conjunction with second aspect, in the execution mode that the first is feasible, described camera comprises the first camera and second camera, and described mobile terminal also comprises:
Coordinate sets up module, for the line of described first camera and described second camera for reference axis, with the mid point of described line for the origin of coordinates, set up three-dimensional orthogonal coordinate system;
The position of wherein said object is the coordinate of described object in described three-dimensional orthogonal coordinate system.
In conjunction with the first feasible execution mode of second aspect, in the execution mode that the second is feasible, described selection module, comprising:
First selected cell, for selecting the image obtained within N+1 the time interval;
Judging unit, for from N+2 the time interval, after often obtaining a two field picture, judge that the position vector of described object in current time interval and last time select the first angle between the position vector of described object in the time interval of image whether to be greater than default angle threshold;
Second selected cell, for when the judged result of described judging unit is for being, selects the described two field picture obtained.
In conjunction with the first feasible execution mode of second aspect, in the execution mode that the third is feasible, described first camera and described second camera are rotating camera, and described focusing module, comprising:
Determining unit, in described three-dimensional orthogonal coordinate system, determine the position vector of described object in current time interval and prediction within the described next time interval described object position vector between the second angle;
Focus unit, for according to described second angle described first camera of adjustment and the anglec of rotation of described second camera, to focus the position of described object within the described next time interval of described prediction to make described first camera and described second camera.
In conjunction with the first feasible execution mode of second aspect, in the 4th kind of feasible execution mode, described prediction module, comprising:
Fitting unit, for from N number of time interval, the coordinate of described object in described three-dimensional orthogonal coordinate system determined according to the image obtained in each time interval is before carried out curve fitting, determines or upgrade the coordinate-function of time of described object;
Computing unit, for by the time application in the described next time interval in described coordinate-function of time, obtain the coordinate of described object in the next time interval.
In the embodiment of the present invention, by camera preset shooting time in the top n time interval in obtain N two field picture, and determine in N number of position of described top n time interval internal object thing according to described N two field picture, from N number of time interval, according to the position of described object in the position prediction of the described object next time interval in each time interval till current, according to the position of described object in the next time interval of prediction, adjust the focusing of described camera in the described next time interval and obtain the image of described object, until described default shooting time terminates, select to meet at least two pre-conditioned two field pictures from obtained image, and according to selected at least two two field picture synthesis dynamic images.Owing to having carried out predict and focusing in the position of each time interval to next time interval internal object thing, make the definition of the image in next time interval collection higher, and then the definition of dynamic image of synthesis can have been improved.
Accompanying drawing explanation
In order to be illustrated more clearly in embodiment of the present invention technical scheme, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the moving camera shooting method that one embodiment of the present of invention provide;
Fig. 2 is the schematic flow sheet of the moving camera shooting method that an alternative embodiment of the invention provides;
Fig. 3 is the schematic flow sheet of the moving camera shooting method that another embodiment of the present invention provides;
Fig. 4 is the structural representation of the mobile terminal that one embodiment of the present of invention provide;
Fig. 5 is the structural representation of the mobile terminal that an alternative embodiment of the invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In specific implementation, the terminal described in the embodiment of the present invention can comprise: camera, mobile phone, panel computer, palmtop PC or other there is the equipment etc. of shoot function, above-mentioned terminal is only citing, and non exhaustive, including but not limited to above-mentioned terminal.The moving camera shooting method provided the embodiment of the present invention below in conjunction with accompanying drawing and mobile terminal are specifically described.
See Fig. 1, it is the schematic flow sheet of the moving camera shooting method that one embodiment of the present of invention provide.As shown in Figure 1, the method can comprise the steps:
S101, by obtaining N two field picture in the top n time interval of camera in the shooting time preset, and to determine in N number of position of described top n time interval internal object thing according to described N two field picture.
Particularly, the shooting time of moving camera shooting can be preset.During each execution moving camera shooting, this shooting time preset can be divided into multiple time interval.Alternatively, this shooting time preset can be arranged by user, or by mobile terminal default setting, wherein the duration in each time interval can be identical or different.
As a kind of feasible execution mode, within the top n time interval, a two field picture can be obtained at the particular point in time in each time interval, obtain N two field picture.Such as, can at the start time point in each time interval, interlude point or end time point acquisition one two field picture.For each two field picture got, by analyzing the position can determining the object place when obtaining this two field picture, then can determine in N number of position of N number of time interval internal object thing according to N two field picture.In the embodiment of the present invention, the position of object refers to object position in space, instead of object position in the picture.
Wherein, N be greater than 4 integer.Preferably, the top n time interval can be a period of time shorter in default shooting time, such as the first five/time of mono-or the time of front 1/10th.In addition, if need obtain more images for analyzing, then the numerical value of N can arrange larger.Such as, N can be greater than 5.
S102, from N number of time interval, according to the position of described object in the position prediction of the described object next time interval in each time interval till current.
In concrete enforcement, the movement locus of object is usually in certain rule.When determining multiple in the movement locus of object, can according to the movement locus of the plurality of some fit object thing.In the embodiment of the present invention, from N number of time interval, determined at least N number of point in the movement locus of object, then can the movement locus of fit object thing, can determine in the position of next time interval object according to the movement locus of matching.Such as, in N number of time interval, obtain N two field picture, first is obtained to N number of position of N number of time interval internal object thing according to the N two field picture obtained, according to N number of position, a movement locus can be simulated, and then prediction is in the position of N+1 time interval internal object thing; N+1 the time interval, obtained N+1 two field picture, obtained N+1 position of object, the movement locus of updatable object thing according to this N+1 two field picture, prediction is in the position of N+2 time interval internal object thing further.By that analogy, along with the image obtained gets more and more, point known on movement locus gets more and more, then will be further accurate to the matching of the movement locus of object, will be more accurate to the prediction of the position of object afterwards.
S103, according to the position of described object in the next time interval of prediction, adjusts the focusing of described camera in the described next time interval and obtains the image of described object, until described default shooting time terminates.
Particularly, after often predicting the position of next time interval internal object thing, the focusing of adjustable camera, make the position of its prediction of focusing, gather image in the next time interval according to the focusing after adjustment, just focusing is to object, can obtain the picture rich in detail of object.
S104, selects to meet at least two pre-conditioned two field pictures from obtained image, and according to selected at least two two field picture synthesis dynamic images.
In concrete enforcement, from N+1 the time interval, the image of acquisition is all the image more clearly of focusing to object.Therefore, can select to meet at least two pre-conditioned two field pictures from N+1 the time interval and the image obtained afterwards.
In the embodiment that some are feasible, meeting pre-conditioned can be that in present image, the definition of object exceedes default clarity threshold; Or, can be that the position of position and the object in the last image selected of object in present image is within the scope of certain distance; Or, can be that in present image, object with the direction of the relative object of reference of object in the last image selected, the change etc. in preset range occurs relative to the direction of object of reference.
In the embodiment of the present invention, by camera preset shooting time in the top n time interval in obtain N two field picture, and determine in N number of position of described top n time interval internal object thing according to described N two field picture, from N number of time interval, according to the position of described object in the position prediction of the described object next time interval in each time interval till current, according to the position of described object in the next time interval of prediction, adjust the focusing of described camera in the described next time interval and obtain the image of described object, until described default shooting time terminates, select to meet at least two pre-conditioned two field pictures from obtained image, and according to selected at least two two field picture synthesis dynamic images.Owing to having carried out predict and focusing in the position of each time interval to next time interval internal object thing, make the definition of the image in next time interval collection higher, and then the definition of dynamic image of synthesis can have been improved.
See Fig. 2, it is the schematic flow sheet of the moving camera shooting method that an alternative embodiment of the invention provides.Wherein said moving camera shooting method can be applicable to the mobile terminal comprising the first camera and second camera.As shown in Figure 2, the method can comprise the steps:
S201, with the line of described first camera and described second camera for reference axis, with the mid point of described line for the origin of coordinates, sets up three-dimensional orthogonal coordinate system.
In the embodiment of the present invention, mobile terminal is provided with at least two cameras, comprises the first camera and second camera.
Particularly, can be the first reference axis with the line of the first camera and second camera, with the mid point of described line for the origin of coordinates, set up three-dimensional orthogonal coordinate system.
In the execution mode that some are feasible, the second reference axis of the three-dimensional orthogonal coordinate system of foundation and three axes can planes at the first camera and second camera place, and another is perpendicular to the plane at the first camera and second camera place.
S202, obtains N two field picture by the first camera and second camera in the top n time interval in the shooting time preset, and determines in N number of position of described top n time interval internal object thing according to described N two field picture.
In the embodiment of the present invention, the position of described object is the coordinate of described object in described three-dimensional orthogonal coordinate system.
Particularly, the shooting time of moving camera shooting can be preset.During each execution moving camera shooting, this shooting time preset can be divided into multiple time interval.Alternatively, the duration in each time interval can be identical or different.
As a kind of feasible execution mode, within the top n time interval, a two field picture can be obtained at the particular point in time in each time interval, obtain N two field picture.The image that the two field picture obtained within each time interval is formed respectively by object on the first camera and second camera obtains.Wherein different with the position of imaging in second camera at the first camera at synchronization object, utilize principle of parallax can determine the distance of object from the first camera and second camera, and then determine the coordinate of object in set up three-dimensional orthogonal coordinate system.
As a kind of feasible execution mode, the coordinate of the coordinate available targets thing central point of object in three-dimensional orthogonal coordinate system represents.
Wherein, N be greater than 4 integer.Preferably, the top n time interval can be a period of time shorter in default shooting time, such as the first five/time of mono-or the time of front 1/10th.In addition, if need obtain more images for analyzing, then the numerical value of N can arrange larger.Such as, N can be greater than 5.
S203, from N number of time interval, according to the position of described object in the position prediction of the described object next time interval in each time interval till current.
In concrete enforcement, the movement locus of object is usually in certain rule.When determining multiple in the movement locus of object, can according to the movement locus of the plurality of some fit object thing.
In the embodiment of the present invention, from N number of time interval, determined at least N number of point in the movement locus of object, then can the movement locus of fit object thing, can determine in the position of next time interval object according to the movement locus of matching.Particularly, can carry out curve fitting respectively to the three-dimensional coordinate of fixed at least N number of point, determine the rule of movement locus in each dimension of object, and then prediction is at the coordinate of following time interval object in each dimension.Such as, in N number of time interval, obtain N two field picture, first is obtained to N number of three-dimensional coordinate of N number of time interval internal object thing according to the N two field picture obtained, least square method can be adopted to carry out matching to N number of first dimension coordinate in N number of three-dimensional coordinate, obtain the first dimension coordinate and the functional relation between the time, by the time point the application corresponding next time interval and this functional relation, measurable the first dimension coordinate at next time interval object.Adopt and use the same method, measurable the second peacekeeping third dimension coordinate at next time interval object, thus prediction is at the three-dimensional coordinate of next time interval object.In like manner, N+1 the time interval, obtain N+1 two field picture, obtain N+1 three-dimensional coordinate of object according to this N+1 two field picture, the three-dimensional coordinate of updatable object thing and the functional relation between the time, prediction is at the three-dimensional coordinate of N+2 time interval internal object thing further.By that analogy, along with the image obtained gets more and more, known coordinate gets more and more, then will be further accurate to the matching of the movement locus of object, will be more accurate to the prediction of the position of object afterwards.
S204, according to the position of described object in the next time interval of prediction, adjusts the focusing of described camera in the described next time interval and obtains the image of described object, until described default shooting time terminates.
Particularly, the corresponding position vector of each point in 3 D stereo coordinate system.Position vector refers to the vector from the origin of coordinates to this point.
After image in each acquisition current time interval also predicts the position of next time interval internal object thing, can determine the position vector that the position in the position vector of current time interval internal object thing and the next time interval of prediction is corresponding, the angle between these two position vectors is the movement angle of relative first camera of object and second camera.
As a kind of feasible execution mode, if the first camera and second camera are rotating camera, the first camera is driven to rotate the angle consistent with described movement angle with second camera by motor
S205, selects the image obtained within N+1 the time interval.
In concrete enforcement, from N+1 the time interval, acquisition be all object is focused after image, therefore in image, object is more clear.In the execution mode that some are feasible, can using the image that obtains in N+1 the time interval as one of image selected.Wherein, the image of selection can be used for synthesizing dynamic image.
S206, from N+2 the time interval, after often obtaining a two field picture, judge that the position vector of described object in current time interval and last time select the first angle between the position vector of described object in the time interval of image whether to be greater than default angle threshold.
In concrete enforcement, from N+2 the time interval, after often obtaining a two field picture, the position vector of the object determined with the image selected according to the last time by the position vector of the object determined according to the image of current acquisition contrasts, and can judge whether the first angle between two position vectors is greater than default angle threshold.
Alternatively, described default angle threshold can set according to the length of the length of movement locus or default shooting time, if the longer or default shooting time of movement locus is longer, the angle threshold preset can be arranged greatly.As a kind of feasible execution mode, the angle between the position vector of first time interval internal object thing and the position vector of N number of time interval internal object thing can be set to the angle threshold preset.
S207, if described first angle is greater than default angle threshold, then selects the described two field picture obtained.
In concrete enforcement, if the first angle is greater than default angle threshold, illustrate selecting image from the last time to current time interval, object has moved certain distance, the image selected according to the last time and this image obtained carry out synthesis and can not produce ghost image, then can select this image obtained.Otherwise, if the angle between two position vectors is less than default angle threshold, if synthesize dynamic image together with the image selected of the image selecting this to obtain and last time, then may produces ghost image, affect image display effect.
S208, according to selected at least two two field picture synthesis dynamic images.
After have selected at least two two field pictures, can dynamic image be synthesized according to selected at least two two field pictures, show the movement locus of object.
In the embodiment of the present invention, with the line of the first camera and second camera for reference axis, with the mid point of line for the origin of coordinates, set up three-dimensional orthogonal coordinate system, N two field picture is obtained in the top n time interval in the shooting time preset, determine the N number of position at top n time interval internal object thing, from N number of time interval, the position of the next time interval internal object thing of prediction, according to the position of the next time interval internal object thing of prediction, next time interval adjustment camera focusing and obtain the image of object, select the image obtained within N+1 the time interval, from N+2 the time interval, after often obtaining a two field picture, if the position vector of current time interval internal object thing and last time select the first angle between the position vector of the time interval internal object thing of image to be greater than default angle threshold, then select a two field picture of current acquisition, at least two two field picture synthesis dynamic images selected by last basis.Owing to having carried out predicting and focusing in the position of each time interval to next time interval internal object thing, make the definition of the image gathered in the next time interval higher, and then the definition of dynamic image of synthesis can be improved, in addition, during every twice selection image, between the position vector of object, shape forms an angle, and can avoid has ghost image in the image synthesized.
See Fig. 3, it is the schematic flow sheet of the moving camera shooting method that an alternative embodiment of the invention provides.Wherein said moving camera shooting method can be applicable to the mobile terminal comprising the first camera and second camera.As shown in Figure 3, the method can comprise the steps:
S301, with the line of described first camera and described second camera for reference axis, with the mid point of described line for the origin of coordinates, sets up three-dimensional orthogonal coordinate system.
S302, by obtaining N two field picture in the top n time interval of camera in the shooting time preset, and to determine in N number of position of described top n time interval internal object thing according to described N two field picture.
Wherein, N be greater than 4 integer.The position of described object is the coordinate of described object in described three-dimensional orthogonal coordinate system.
S303, makes i=N.
S304, carries out curve fitting to i the coordinate of object described in the first to the i-th time interval in described three-dimensional orthogonal coordinate system, obtains the coordinate-function of time of described object.
S305, by the time application in the i-th+1 time interval in described coordinate-function of time, calculates the coordinate of described object in the i-th+1 time interval.
S306, according to the coordinate of described object in the i-th+1 time interval calculated, adjusts the focusing of the first camera and second camera the i-th+1 time interval and obtains the image of described object.
Particularly, in described three-dimensional orthogonal coordinate system, determine the position vector of described object in current time interval and prediction within the described next time interval described object position vector between the second angle;
According to described second angle described first camera of adjustment and the anglec of rotation of described second camera, to focus the position of described object within the described next time interval of described prediction to make described first camera and described second camera.
S307, judge that position vector and the last time of described object in the i-th+1 time interval select the first angle between the position vector of described object in the time interval of image whether to be greater than default angle threshold, if be judged as YES, perform S308, otherwise return S304 after making i counting add 1.
The image wherein selected first is the image obtained within N+1 the time interval.
S308, selects the image obtained within described the i-th+1 time interval.
S309, judges whether described default shooting time terminates, if so, then performs S310, otherwise returns S304 after making i counting add 1.
S310, according to selected Images uniting dynamic image.
In the embodiment of the present invention, with the line of the first camera and second camera for reference axis, with the mid point of line for the origin of coordinates, set up three-dimensional orthogonal coordinate system, N two field picture is obtained in the top n time interval in the shooting time preset, determine the N number of position at top n time interval internal object thing, from N number of time interval, the position of the next time interval internal object thing of prediction, according to the position of the next time interval internal object thing of prediction, next time interval adjustment camera focusing and obtain the image of object, select the image obtained within N+1 the time interval, from N+2 the time interval, after often obtaining a two field picture, if the position vector of current time interval internal object thing and last time select the first angle between the position vector of the time interval internal object thing of image to be greater than default angle threshold, then select a two field picture of current acquisition, at least two two field picture synthesis dynamic images selected by last basis.Owing to having carried out predicting and focusing in the position of each time interval to next time interval internal object thing, make the definition of the image gathered in the next time interval higher, and then the definition of dynamic image of synthesis can be improved, in addition, during every twice selection image, between the position vector of object, shape forms an angle, and can avoid has ghost image in the image synthesized.
See Fig. 4, it is the structural representation of the mobile terminal that one embodiment of the present of invention provide.As shown in Figure 4, this mobile terminal can comprise acquisition module 401, prediction module 402, focusing module 403 and select module 404, wherein:
Acquisition module 401, for by obtaining N two field picture in the top n time interval of camera in the shooting time preset, and determines in N number of position of described top n time interval internal object thing according to described N two field picture, wherein N be greater than 4 integer.
Particularly, the shooting time of moving camera shooting can be preset.During each execution moving camera shooting, this shooting time preset can be divided into multiple time interval.Alternatively, this shooting time preset can be arranged by user, or by mobile terminal default setting, wherein the duration in each time interval can be identical or different.
As a kind of feasible execution mode, within the top n time interval, a two field picture can be obtained at the particular point in time in each time interval, obtain N two field picture.Such as, can at the start time point in each time interval, interlude point or end time point acquisition one two field picture.For each two field picture got, by analyzing the position can determining the object place when obtaining this two field picture, then can determine in N number of position of N number of time interval internal object thing according to N two field picture.In the embodiment of the present invention, the position of object refers to object position in space, instead of object position in the picture.
Wherein, N be greater than 4 integer.Preferably, the top n time interval can be a period of time shorter in default shooting time, such as the first five/time of mono-or the time of front 1/10th.In addition, if need obtain more images for analyzing, then the numerical value of N can arrange larger.Such as, N can be greater than 5.
Prediction module 402, for from N number of time interval, according to the position of described object in the position prediction next time interval of described object in each time interval till current.
In concrete enforcement, the movement locus of object is usually in certain rule.When determining multiple in the movement locus of object, can according to the movement locus of the plurality of some fit object thing.In the embodiment of the present invention, from N number of time interval, determined at least N number of point in the movement locus of object, then can the movement locus of fit object thing, can determine in the position of next time interval object according to the movement locus of matching.Such as, in N number of time interval, obtain N two field picture, first is obtained to N number of position of N number of time interval internal object thing according to the N two field picture obtained, according to N number of position, a movement locus can be simulated, and then prediction is in the position of N+1 time interval internal object thing; N+1 the time interval, obtained N+1 two field picture, obtained N+1 position of object, the movement locus of updatable object thing according to this N+1 two field picture, prediction is in the position of N+2 time interval internal object thing further.By that analogy, along with the image obtained gets more and more, point known on movement locus gets more and more, then will be further accurate to the matching of the movement locus of object, will be more accurate to the prediction of the position of object afterwards.
Focusing module 403, for according to the position of described object in the next time interval of prediction, adjusts the focusing of described camera in the described next time interval and obtains the image of described object, until described default shooting time terminates.
Particularly, after often predicting the position of next time interval internal object thing, the focusing of adjustable camera, make the position of its prediction of focusing, gather image in the next time interval according to the focusing after adjustment, just focusing is to object, can obtain the picture rich in detail of object.
Selecting module 404, meeting at least two pre-conditioned two field pictures for selecting from obtained image, and according to selected at least two two field picture synthesis dynamic images.
In concrete enforcement, from N+1 the time interval, the image of acquisition is all the image more clearly of focusing to object.Therefore, can select to meet at least two pre-conditioned two field pictures from N+1 the time interval and the image obtained afterwards.
In the embodiment that some are feasible, meeting pre-conditioned can be that in present image, the definition of object exceedes default clarity threshold; Or, can be that the position of position and the object in the last image selected of object in present image is within the scope of certain distance; Or, can be that in present image, object with the direction of the relative object of reference of object in the last image selected, the change etc. in preset range occurs relative to the direction of object of reference.
In the embodiment of the present invention, by camera preset shooting time in the top n time interval in obtain N two field picture, and determine in N number of position of described top n time interval internal object thing according to described N two field picture, from N number of time interval, according to the position of described object in the position prediction of the described object next time interval in each time interval till current, according to the position of described object in the next time interval of prediction, adjust the focusing of described camera in the described next time interval and obtain the image of described object, until described default shooting time terminates, select to meet at least two pre-conditioned two field pictures from obtained image, and according to selected at least two two field picture synthesis dynamic images.Owing to having carried out predict and focusing in the position of each time interval to next time interval internal object thing, make the definition of the image in next time interval collection higher, and then the definition of dynamic image of synthesis can have been improved.
See Fig. 5, it is the structural representation of the mobile terminal that one embodiment of the present of invention provide.As shown in Figure 4, this mobile terminal can comprise the first camera and second camera, also comprises coordinate and sets up module 501, acquisition module 502, prediction module 503, focusing module 504 and select module 505, wherein:
Coordinate sets up module 501, for the line of described first camera and described second camera for reference axis, with the mid point of described line for the origin of coordinates, set up three-dimensional orthogonal coordinate system.
In the embodiment of the present invention, mobile terminal is provided with at least two cameras, comprises the first camera and second camera.
Particularly, can be the first reference axis with the line of the first camera and second camera, with the mid point of described line for the origin of coordinates, set up three-dimensional orthogonal coordinate system.
In the execution mode that some are feasible, the second reference axis of the three-dimensional orthogonal coordinate system of foundation and three axes can planes at the first camera and second camera place, and another is perpendicular to the plane at the first camera and second camera place.
Acquisition module 502, for by obtaining N two field picture in the top n time interval of camera in the shooting time preset, and determines in N number of position of described top n time interval internal object thing according to described N two field picture, wherein N be greater than 4 integer.
In the embodiment of the present invention, the position of described object is the coordinate of described object in described three-dimensional orthogonal coordinate system.
Particularly, the shooting time of moving camera shooting can be preset.During each execution moving camera shooting, this shooting time preset can be divided into multiple time interval.Alternatively, the duration in each time interval can be identical or different.
As a kind of feasible execution mode, within the top n time interval, a two field picture can be obtained at the particular point in time in each time interval, obtain N two field picture.The image that the two field picture obtained within each time interval is formed respectively by object on the first camera and second camera obtains.Wherein different with the position of imaging in second camera at the first camera at synchronization object, utilize principle of parallax can determine the distance of object from the first camera and second camera, and then determine the coordinate of object in set up three-dimensional orthogonal coordinate system.
As a kind of feasible execution mode, the coordinate of the coordinate available targets thing central point of object in three-dimensional orthogonal coordinate system represents.
Wherein, N be greater than 4 integer.Preferably, the top n time interval can be a period of time shorter in default shooting time, such as the first five/time of mono-or the time of front 1/10th.In addition, if need obtain more images for analyzing, then the numerical value of N can arrange larger.Such as, N can be greater than 5.
Prediction module 503, for from N number of time interval, according to the position of described object in the position prediction next time interval of described object in each time interval till current.
In the execution mode that some are feasible, prediction module 503 can be used for performing the execution mode performed by middle prediction module 402 embodiment illustrated in fig. 4.
In the present embodiment, prediction module 503 can comprise:
Fitting unit 5031, for from N number of time interval, the coordinate of described object in described three-dimensional orthogonal coordinate system determined according to the image obtained in each time interval is before carried out curve fitting, determines or upgrade the coordinate-function of time of described object;
Computing unit 5032, for by the time application in the described next time interval in described coordinate-function of time, obtain the coordinate of described object in the next time interval.
In the embodiment of the present invention, from N number of time interval, determined at least N number of point in the movement locus of object, then can the movement locus of fit object thing, can determine in the position of next time interval object according to the movement locus of matching.Particularly, can carry out curve fitting respectively to the three-dimensional coordinate of fixed at least N number of point, determine the rule of movement locus in each dimension of object, and then prediction is at the coordinate of following time interval object in each dimension.Such as, in N number of time interval, obtain N two field picture, first is obtained to N number of three-dimensional coordinate of N number of time interval internal object thing according to the N two field picture obtained, least square method can be adopted to carry out matching to N number of first dimension coordinate in N number of three-dimensional coordinate, obtain the first dimension coordinate and the functional relation between the time, by the time point the application corresponding next time interval and this functional relation, measurable the first dimension coordinate at next time interval object.Adopt and use the same method, measurable the second peacekeeping third dimension coordinate at next time interval object, thus prediction is at the three-dimensional coordinate of next time interval object.In like manner, N+1 the time interval, obtain N+1 two field picture, obtain N+1 three-dimensional coordinate of object according to this N+1 two field picture, the three-dimensional coordinate of updatable object thing and the functional relation between the time, prediction is at the three-dimensional coordinate of N+2 time interval internal object thing further.By that analogy, along with the image obtained gets more and more, known coordinate gets more and more, then will be further accurate to the matching of the movement locus of object, will be more accurate to the prediction of the position of object afterwards.
Focusing module 504, for according to the position of described object in the next time interval of prediction, adjusts the focusing of described camera in the described next time interval and obtains the image of described object, until described default shooting time terminates.
In the execution mode that some are feasible, focusing module 504 can be used for performing the execution mode performed by middle focusing module 403 embodiment illustrated in fig. 4.
In the present embodiment, described first camera and described second camera are rotating camera, and described focusing module 504 can comprise:
Determining unit 5041, in described three-dimensional orthogonal coordinate system, determine the position vector of described object in current time interval and prediction within the described next time interval described object position vector between the second angle.
Focus unit 5042, for according to described second angle described first camera of adjustment and the anglec of rotation of described second camera, to focus the position of described object within the described next time interval of described prediction to make described first camera and described second camera.
Selecting module 505, meeting at least two pre-conditioned two field pictures for selecting from obtained image, and according to selected at least two two field picture synthesis dynamic images.
In the execution mode that some are feasible, module 505 is selected to can be used for performing the execution mode performed by middle focusing module 404 embodiment illustrated in fig. 4.
In the present embodiment, described selection module 505 can comprise:
First selected cell 5051, for selecting the image obtained within N+1 the time interval.
In concrete enforcement, from N+1 the time interval, acquisition be all object is focused after image, therefore in image, object is more clear.In the execution mode that some are feasible, can using the image that obtains in N+1 the time interval as one of image selected.Wherein, the image of selection can be used for synthesizing dynamic image.
Judging unit 5052, for from N+2 the time interval, after often obtaining a two field picture, judge that the position vector of described object in current time interval and last time select the first angle between the position vector of described object in the time interval of image whether to be greater than default angle threshold.
In concrete enforcement, from N+2 the time interval, after often obtaining a two field picture, the position vector of the object determined with the image selected according to the last time by the position vector of the object determined according to the image of current acquisition contrasts, and can judge whether the first angle between two position vectors is greater than default angle threshold.
Alternatively, described default angle threshold can set according to the length of the length of movement locus or default shooting time, if the longer or default shooting time of movement locus is longer, the angle threshold preset can be arranged greatly.As a kind of feasible execution mode, the angle between the position vector of first time interval internal object thing and the position vector of N number of time interval internal object thing can be set to the angle threshold preset.
Second selected cell 5053, for when the judged result of described judging unit is for being, selects the described two field picture obtained.
In concrete enforcement, if the first angle is greater than default angle threshold, illustrate selecting image from the last time to current time interval, object has moved certain distance, the image selected according to the last time and this image obtained carry out synthesis and can not produce ghost image, then can select this image obtained.Otherwise, if the angle between two position vectors is less than default angle threshold, if synthesize dynamic image together with the image selected of the image selecting this to obtain and last time, then may produces ghost image, affect image display effect.
After have selected at least two two field pictures, can dynamic image be synthesized according to selected at least two two field pictures, show the movement locus of object.
In the embodiment of the present invention, with the line of the first camera and second camera for reference axis, with the mid point of line for the origin of coordinates, set up three-dimensional orthogonal coordinate system, N two field picture is obtained in the top n time interval in the shooting time preset, determine the N number of position at top n time interval internal object thing, from N number of time interval, the position of the next time interval internal object thing of prediction, according to the position of the next time interval internal object thing of prediction, next time interval adjustment camera focusing and obtain the image of object, select the image obtained within N+1 the time interval, from N+2 the time interval, after often obtaining a two field picture, if the position vector of current time interval internal object thing and last time select the first angle between the position vector of the time interval internal object thing of image to be greater than default angle threshold, then select a two field picture of current acquisition, at least two two field picture synthesis dynamic images selected by last basis.Owing to having carried out predicting and focusing in the position of each time interval to next time interval internal object thing, make the definition of the image gathered in the next time interval higher, and then the definition of dynamic image of synthesis can be improved, in addition, during every twice selection image, between the position vector of object, shape forms an angle, and can avoid has ghost image in the image synthesized.
Unit in all embodiments of the present invention, universal integrated circuit can be passed through, such as CPU (CentralProcessingUnit, central processing unit), or realized by ASIC (ApplicationSpecificIntegratedCircuit, application-specific integrated circuit (ASIC)).
Step in embodiment of the present invention method can be carried out order according to actual needs and be adjusted, merges and delete.
Unit in embodiment of the present invention device can carry out merging, divide and deleting according to actual needs.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-OnlyMemory, ROM) or random store-memory body (RandomAccessMemory, RAM) etc.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (10)
1. a moving camera shooting method, is characterized in that, comprising:
By obtaining N two field picture in the top n time interval of camera in the shooting time preset, and determine in N number of position of described top n time interval internal object thing according to described N two field picture, wherein N be greater than 4 integer;
From N number of time interval, according to the position of described object in the position prediction of the described object next time interval in each time interval till current;
According to the position of described object in the next time interval of prediction, adjust the focusing of described camera in the described next time interval and obtain the image of described object, until described default shooting time terminates;
Select to meet at least two pre-conditioned two field pictures from obtained image, and according to selected at least two two field picture synthesis dynamic images.
2. method according to claim 1, is characterized in that, described camera comprises the first camera and second camera, and described method also comprises:
With the line of described first camera and described second camera for reference axis, with the mid point of described line for the origin of coordinates, set up three-dimensional orthogonal coordinate system;
The position of wherein said object is the coordinate of described object in described three-dimensional orthogonal coordinate system.
3. method according to claim 2, is characterized in that, described selection from obtained image meets at least two pre-conditioned two field pictures, comprising:
Select the image obtained within N+1 the time interval;
From N+2 the time interval, after often obtaining a two field picture, judge that the position vector of described object in current time interval and last time select the first angle between the position vector of described object in the time interval of image whether to be greater than default angle threshold;
If described first angle is greater than default angle threshold, then select the described two field picture obtained.
4. method according to claim 2, it is characterized in that, described first camera and described second camera are rotating camera, the described position according to described object in the next time interval of prediction, adjust the focusing of described camera in the described next time interval, comprising:
In described three-dimensional orthogonal coordinate system, determine the position vector of described object in current time interval and prediction within the described next time interval described object position vector between the second angle;
According to described second angle described first camera of adjustment and the anglec of rotation of described second camera, to focus the position of described object within the described next time interval of described prediction to make described first camera and described second camera.
5. method according to claim 2, is characterized in that, described from N number of time interval, according to the position of described object in the position prediction of the described object next time interval in each time interval till current, comprising:
From N number of time interval, the coordinate of described object in described three-dimensional orthogonal coordinate system determined is carried out curve fitting, determine or upgrade the coordinate-function of time of described object in each time interval before according to the image obtained;
By the time application in the described next time interval in described coordinate-function of time, obtain the coordinate of described object in the next time interval.
6. a mobile terminal, is characterized in that, comprising:
Acquisition module, for by obtaining N two field picture in the top n time interval of camera in the shooting time preset, and determines in N number of position of described top n time interval internal object thing according to described N two field picture, wherein N be greater than 4 integer;
Prediction module, for from N number of time interval, according to the position of described object in the position prediction next time interval of described object in each time interval till current;
Focusing module, for according to the position of described object in the next time interval of prediction, adjusts the focusing of described camera in the described next time interval and obtains the image of described object, until described default shooting time terminates;
Selecting module, meeting at least two pre-conditioned two field pictures for selecting from obtained image, and according to selected at least two two field picture synthesis dynamic images.
7. mobile terminal according to claim 6, is characterized in that, described camera comprises the first camera and second camera, and described mobile terminal also comprises:
Coordinate sets up module, for the line of described first camera and described second camera for reference axis, with the mid point of described line for the origin of coordinates, set up three-dimensional orthogonal coordinate system;
The position of wherein said object is the coordinate of described object in described three-dimensional orthogonal coordinate system.
8. mobile terminal according to claim 7, is characterized in that, described selection module, comprising:
First selected cell, for selecting the image obtained within N+1 the time interval;
Judging unit, for from N+2 the time interval, after often obtaining a two field picture, judge that the position vector of described object in current time interval and last time select the first angle between the position vector of described object in the time interval of image whether to be greater than default angle threshold;
Second selected cell, for when the judged result of described judging unit is for being, selects the described two field picture obtained.
9. mobile terminal according to claim 7, is characterized in that, described first camera and described second camera are rotating camera, and described focusing module, comprising:
Determining unit, in described three-dimensional orthogonal coordinate system, determine the position vector of described object in current time interval and prediction within the described next time interval described object position vector between the second angle;
Focus unit, for according to described second angle described first camera of adjustment and the anglec of rotation of described second camera, to focus the position of described object within the described next time interval of described prediction to make described first camera and described second camera.
10. mobile terminal according to claim 7, is characterized in that, described prediction module, comprising:
Fitting unit, for from N number of time interval, the coordinate of described object in described three-dimensional orthogonal coordinate system determined according to the image obtained in each time interval is before carried out curve fitting, determines or upgrade the coordinate-function of time of described object;
Computing unit, for by the time application in the described next time interval in described coordinate-function of time, obtain the coordinate of described object in the next time interval.
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